Solved UPSC CDS/OTA Question
A solved UPSC CDS/OTA PYQ — decoded step-by-step.
Solve it the standard way once — then learn the shortcut.
Q · GravitationMedium · 45s
If the mass of Earth were doubled and its radius halved, ‘g’ would be:
TopicGravitation
Question Typemultiple choice
DifficultyMedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
The complete worked solution.
Every step explained — no skipped algebra.
g ∝ M/R² ⇒ new g = (2M)/(½R)² = (2M)/(¼R²) = 8 times.
Final Answer: Option D — Eight times